uboot: (firmwareOdroidC2/C4) don't invoke patch tool, use patches = [] instead

https://github.com/NixOS/nixpkgs/blob/master/pkgs/stdenv/generic/setup.sh#L948
this can do it nicely.

Signed-off-by: Anton Arapov <anton@deadbeef.mx>

pkgs/development/libraries/readline/7.0.nix

@@ -0,0 +1,62 @@
+{ fetchurl, lib, stdenv, ncurses
+}:
+
+stdenv.mkDerivation rec {
+  pname = "readline";
+  version = "7.0p${toString (builtins.length upstreamPatches)}";
+
+  src = fetchurl {
+    url = "mirror://gnu/readline/readline-${meta.branch}.tar.gz";
+    sha256 = "0d13sg9ksf982rrrmv5mb6a2p4ys9rvg9r71d6il0vr8hmql63bm";
+  };
+
+  outputs = [ "out" "dev" "man" "doc" "info" ];
+
+  propagatedBuildInputs = [ncurses];
+
+  patchFlags = [ "-p0" ];
+
+  upstreamPatches =
+    (let
+       patch = nr: sha256:
+         fetchurl {
+           url = "mirror://gnu/readline/readline-${meta.branch}-patches/readline70-${nr}";
+           inherit sha256;
+         };
+     in
+       import ./readline-7.0-patches.nix patch);
+
+  patches =
+    [ ./link-against-ncurses.patch
+      ./no-arch_only-6.3.patch
+    ]
+    ++ upstreamPatches;
+
+  meta = with lib; {
+    description = "Library for interactive line editing";
+
+    longDescription = ''
+      The GNU Readline library provides a set of functions for use by
+      applications that allow users to edit command lines as they are
+      typed in.  Both Emacs and vi editing modes are available.  The
+      Readline library includes additional functions to maintain a
+      list of previously-entered command lines, to recall and perhaps
+      reedit those lines, and perform csh-like history expansion on
+      previous commands.
+
+      The history facilities are also placed into a separate library,
+      the History library, as part of the build process.  The History
+      library may be used without Readline in applications which
+      desire its capabilities.
+    '';
+
+    homepage = "https://savannah.gnu.org/projects/readline/";
+
+    license = licenses.gpl3Plus;
+
+    maintainers = [ ];
+
+    platforms = platforms.unix;
+    branch = "7.0";
+  };
+}